courser vs gun dog

courser

noun
  • A dog used for coursing. 

  • A person who practises coursing. 

  • Any of several species of bird in the genera Cursorius or Rhinoptilus of the family Glareolidae. 

  • A stone used in building a course. 

  • A racehorse or a charger. 

  • A hunter. 

gun dog

noun
  • A breed of dog used by hunters to find, flush out and retrieve birds and other game. 

How often have the words courser and gun dog occurred in a corpus of books? (source: Google Ngram Viewer )